CAT803TSDI-T3

Supervisors Overview

The CAT803TSDI-T3 is a microprocessor power supply supervisor manufactured by onsemi, designed to monitor voltage levels in electronic systems. It operates within a supply voltage range up to 5.5 V and features an active-low open-drain output. The device provides a fixed reset delay time of 240 ms to ensure stable system initialization. It is available with threshold voltages of 2.5 V, 3 V, 3.3 V, or 5 V. The component functions without manual reset, watchdog timer, or battery backup switching capabilities. It is housed in a compact SOT-23-3 surface-mount package and supports operation across a temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Provides reliable voltage supervision for microprocessor power supplies
• Features an active-low open-drain output interface
• Includes a fixed 240 ms reset delay for system stability

Supervisors Applications

• Microprocessor power supply monitoring
• Embedded system voltage supervision
• Portable electronic device power management

Supervisors Procurement Notes

Verify the specific threshold voltage variant required for the design, as the base part number covers multiple options (2.5 V, 3 V, 3.3 V, 5 V). Confirm that the SOT-23-3 package aligns with the PCB footprint constraints. Check current availability status as distribution channels may vary. Ensure the operating temperature range meets the environmental requirements of the target application.

Supervisors Selection Notes

Select this component when a simple, low-pin-count voltage supervisor is needed for single-input monitoring. It is suitable for designs requiring an open-drain output compatible with various logic families. Consider the fixed reset delay and lack of manual reset functionality during system architecture planning. Evaluate the quiescent current consumption if battery life is a critical design parameter.

Supervisors Part Context

This component belongs to the CAT803 series of 3-pin microprocessor supervisors from onsemi. The series offers various threshold voltages and package options to suit different board space and voltage requirements. It serves as a fundamental building block for ensuring proper power sequencing and fault detection in digital circuits.

Supervisors Replacement Considerations

Check for direct pin-compatible alternatives within the same family, such as other CAT803 variants with different threshold voltages or packages. Verify functional equivalence regarding output type and reset delay before substitution.